Thanks for the suggestions! After BIOS update problem persists. Example is attached (note not correctly displayed character "5").
Output of dmidecode -s bios-version && sudo dmidecode -s bios-release-date: JBET50WW (1.15 ) 06/10/2015 I am aware that this problem is reported for Ubuntu 14.10 which is getting close to end-of-life. The problem was before observed also for 15.04. I performed a downgrade in order to use the Intel graphics stack (which again did not seem to change the problem). ** Attachment added: "ascii.jpg" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1468232/+attachment/4424523/+files/ascii.jpg ** Changed in: xorg (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1468232 Title: Font corruption Intel Broadwell graphics To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1468232/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs